Java中的死锁

两个及以上的线程在执行过程中，因为互相争夺资源而造成一种相互等待的现象，如果外力干涉，那么它们都将无法推进下去，如果系统资源充足，进程的资源请求都能够得到满足，死锁出现的可能性就很低，否则就会因争夺有限的资源而陷入死锁。

public class DeadLockDemo implements Runnable {
    private final String mutex1;
    private final String mutex2;
    public DeadLockDemo(String mutex1, String mutex2) {
        this.mutex1 = mutex1;
        this.mutex2 = mutex2;
    }
    @Override
    public void run() {
        synchronized (mutex1) {
            System.out.println(Thread.currentThread().getName() + "：持有" + mutex1 + "，尝试获取" + mutex2);
            try {
                // 睡眠一定时间，给别的线程获取资源，产生冲突
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (mutex2) {
                System.out.println(Thread.currentThread().getName() + "：持有" + mutex2 + "，尝试获取" + mutex1);
            }
        }
    }
    public static void main(String[] args) {
        String mutex1 = "mutex1";
        String mutex2 = "mutex2";
        new Thread(new DeadLockDemo(mutex1, mutex2), "AAA").start();
        new Thread(new DeadLockDemo(mutex2, mutex1), "BBB").start();
    }
}